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Author Question: A 1.6-kg ball is attached to the end of a 0.40-m string to form a pendulum. This pendulum is ... (Read 246 times)

Charlie

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on: Jul 28, 2018
A 1.6-kg ball is attached to the end of a 0.40-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point of its swing, when it is moving horizontally, the ball collides with a 0.80-kg block initially at rest on a horizontal frictionless surface. The speed of the block just after the collision is 3.0 m/s. What is the speed of the ball just after the collision?
 a. 1.7 m/s
  b. 1.1 m/s
  c. 1.5 m/s
  d. 1.3 m/s
  e. 2.1 m/s

Question 2

An 8.0-kg object moving 4.0 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.0 m/s in the opposite direction. The final velocity of the 8.0-kg object is 2.0 m/s in the positive x direction. What is the total kinetic energy of the two-mass system after the collision?
 a. 32 J
  b. 52 J
  c. 41 J
  d. 25 J
  e. 29 J


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JaynaD87

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

C


Charlie

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Reply 2 on: Jul 28, 2018
Wow, this really help

robbielu01

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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